簡要描述：Each bottle (500 mL) is supplied with a COFRAC Verification Certificate and Certificate of Conformity and Traceability drawn up accordin由上海植茂提供，作為HACH的合作伙伴，還提供COD試劑21258-15、COD試劑21259-15、OD試劑21258-25s
詳細介紹
品牌
HACH/哈希
Each bottle （500 mL） is supplied with a COFRAC Verification Certificate and Certificate of Conformity and Traceability drawn up according to ISO31.
Total Control of the traceability chain and calculated uncertainties
Direct traceability to primary standards and the reference method
The competence and integrity of a laboratory internationally recognized to be accredited for the measurement of pH and conductivity reference materials
Total Control of the traceability chain and calculated uncertainties
Direct traceability to primary standards and the reference method
The competence and integrity of a laboratory internationally recognized to be accredited for the measurement of pH and conductivity reference materials
Specifications
Concentration:4.005 ± 0.010 pH bij 25 °C
Description :traceable to IUPAC pH scale and NIST
Footnote:¹Behalve pH 7,000 door ons geformuleerd in overeenstemming met NIST-, IUPAC- en DIN19266-specificaties van pH 6,865 en pH 7,413 ²Dansk Fundamental Metrologi A/S is geaccrediteerd voor pH-metingen door het Deense accrediteringsorgaan Danske Akkrediterings- og Metrologifond （DANAK） （nr. 255）
